Financial income and expenses - Text Details (Detail) - EUR (€) € in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Financial income and expenses [Abstract] | ||
| Increase (decrease) in financial income expense | € 49 | € (32) |
| Increase (decrease) in net interest expense | € 4 | € (22) |